Create a solid body from negative space in drilled casting

[NXConsultants]

Experts,

I'd like a negative image of this part, so that all the drillings are solid and all current solid geometry is invisible/ removed.

Obviously I can use extract...

Any ideas?

NX5/6

Thanks

 

[Xwheelguy]

I'm not sure how cumbersome this might get when deleting the "leftovers" that you do not need, but one method you might try is to create a primitive Block that is a bit larger than your original model. You can then subtract the original model from the Block feature. You will have some extra bodies/faces left over where the Block extended past the original solid. I'd then try using Delete Face to remove all the areas you don't need. You may also have to Extract the planar faces that are the extents of the holes and Untrim them so they can be used to trim off the ends of the hole "fills" from the new solid body.

Hope that makes sense.

Tim Flater
Senior Designer
Enkei America, Inc.

http://www.enkei.com

Some people are like slinkies....they don't really have a purpose, but they still bring a smile to your face when you push them down the stairs.

 

[looslib]

What you ant is the amount of material removed IF you had started with a exterior machined block of that size.

Build a model that resembles the exterior shape of your finished part.
Then do a subtract of your existing model from the exterior shape model.
Be careful that the resulting shape MUST be a single solid entity. You may have to do some tweaks or add runners between the inetrior cavities to tie the model together. This used to be true, as I don't know if the multi-body limitation has been changed.


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[NXConsultants]

Tim/Ben, thanks, I'll give those suggestions a try in the morning it's home time in the UK!

 

[uwam2ie]

I think for the functional internal volume look at this:

http://www.youtube.com/watch?v=MZLq8WO2rYk

 

[hudson888]

you'd probably get an answer one of two ways. Using the block method and comparing the mass and volume of the block before and after you subtract the casting. Or if you want some fancier more functional geometry then simplify a copy of the solid by deleting the internal faces by regions etc. Then you can delete one from the other to produce a discrete model of the cores.

Best Regards

Hudson

www.jamb.com.au

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